c# - 序列化 部分 XML

prpLregistEx innerObject;
XmlTextReader reader = new XmlTextReader(@"C:\1.xml");
reader.ReadToDescendant("prpLregistEx");

XmlSerializer serializer = new XmlSerializer(typeof(prpLregistEx));
innerObject = serializer.Deserialize(reader.ReadSubtree()) as prpLregistEx; //this gives serializer the part of XML that is for the innerObject data
reader.Close();